Question

Which set of ordered pairs in the form of (x,y) does NOT represent a function of x?

Answer 1

one value of x will link to only one value

Answer 2

like (2,3)
now to can not be paired with any other value of y

Answer 3

it is the basic rule of function

Answer 4

(2,3) (2,5)
as x=2 is paired with more than one value of y so it is not a function

Answer 5

but (2,3) (4,3)
is function as different value of x are paired

Answer 6

so it would be C?

Answer 7

in third option 3 is paired two times ....

Answer 8

yeah ...you got the concept ????

Answer 9

how we solve it ??

Answer 10

also can you check this for me

Answer 11

yes thank you for help on that one! can you check my answer for this one? ^

Answer 12

yeah your approch and ans both are correct

Answer 13

thank you so much for your help!

Answer 14

@gorv

Answer 15

would i have to change it to y=mx+b?

Answer 16

yeah that will be easy

Answer 17

after that calculate the value of line

Answer 18

the point at which line will cut y axis ....at that point x=0
put it in equation and find the value of y and similary when it cut x axis y=0
find x
line passing through those point will be your line

Answer 19

\[y=\frac{ 5 }{ 2 }x +1\]

Answer 20

is that right?

Answer 21

yeah its correct

Answer 22

now put x= 0 and find y
and next time put y=0 and find x

Answer 23

y=1?

Answer 24

yeah at x=0 y=1

Answer 25

and im confused about the second part
i got...

Answer 26

now in y=5/2x+1
put y=0

Answer 27

x= 2/5?

Answer 28

hmmm......0=5/2+1
-1=5/2x
x=-2/5

Answer 29

nnow check which line is passing through these points ??

Answer 30

ohhh okay

Answer 31

would it be B?

Answer 32

it would be A

Answer 33

wegot (0,1)
means x=0 when y=1

Answer 34

Ohh okay, that makes sense now, i was confused on the signs

Answer 35

do you have time for another one?

Answer 36

ive done all of the ones i know how to do, but i have a few that have stumped me

Answer 37

@gorv

Answer 38

yeah slope is right

Answer 39

i am confused on what to do next

Answer 40

now put the value s in pont slope formula

Answer 41

(y-y1)=slope(x-x1)
or
(y-y2)=slope(x-x2)

Answer 42

got it ??

Answer 43

slope =(10/(-17-3))=10/(-20) not 15

Answer 44

ohh okay so (y-8)=10/-20 (x-3)?

Answer 45

well (y-8)=-1/2(x-3)?

Answer 46

noooooo...just put one point either (-17,8) or (3,-2)

Answer 47

oh okay so (y-(-2))=-1/2(x-3)?

Answer 48

yuppp

Answer 49

@gorv

Answer 50

@gorv this number 11?